Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Control device for vehicle drive device

a technology of control device and vehicle drive, which is applied in the direction of propulsion using engine-driven generators, transportation and packaging, propulsion parts, etc., can solve the problems of inability to use the path with better transmission efficiency, inability to meet the needs of vehicles, etc., to improve the fuel efficiency of the vehicle, improve the fuel efficiency, and improve the effect of transmission ra

Active Publication Date: 2014-05-08
TOYOTA JIDOSHA KK
View PDF0 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is a control device for a vehicle drive device that can improve fuel efficiency by controlling the operating point of the engine. The control device has both an electric path and a mechanical path through which power is transmitted. By adjusting the torque of the first electric motor, the operating point of the engine can be controlled without being constrained by the rotation speed of the output-side rotating element. The capacity variable device can change the capacity of the hydraulic power transmission device to adjust the torque generated in the input-side rotating element and improve power transmission efficiency. The control device can also adjust the torque of the first electric motor based on the hydraulic characteristics of the hydraulic power transmission device to optimize fuel efficiency.

Problems solved by technology

As a result, at the engine operating point during this control, a path with better transmission efficiency may not sufficiently be used.
For example, although power transmission efficiency during transmission of power from the engine may be improved by increasing a proportion of power transmission through the path with better transmission efficiency, this may not be possible.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Control device for vehicle drive device
  • Control device for vehicle drive device
  • Control device for vehicle drive device

Examples

Experimental program
Comparison scheme
Effect test

example

[0045]FIG. 1 is a schematic for explaining a configuration of a vehicle drive device 10 of an example of the present invention. In FIG. 1, the vehicle drive device 10 is preferably employed in FR (front-engine rear-drive) type vehicles and includes an engine 12 made up of an internal-combustion engine, a torque converter (hydraulic power transmission device) 16 coupled to a crankshaft 14 of the engine 12, an automatic transmission 18 disposed between the torque converter 16 and drive wheels 58 and coupled to the output side of the torque converter 16, a first electric motor MG1 disposed between the engine 12 and the torque converter 16 and coupled to the crankshaft 14, and a second electric motor MG2 disposed between the torque converter 16 and the automatic transmission 18 and coupled to an input shaft 20 of the automatic transmission 18. The torque converter 16, the automatic transmission 18, the first electric motor MG1, the second electric motor MG2, etc., are configured symmetr...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A control device of a vehicle drive device comprises a hydraulic power transmission device having an input-side rotating element to which power from an engine is input and an output-side rotating element outputting power to drive wheels, a first electric motor directly or indirectly coupled to the input-side rotating element, and a second electric motor directly or indirectly coupled to the drive wheels, the vehicle drive device further comprising an electric path through which power is electrically transmitted by giving / receiving electric power between the first electric motor and the second electric motor and a mechanical path through which power is mechanically transmitted via the hydraulic power transmission device, the control device of the vehicle drive device being configured to control an operating point of the engine by adjusting a torque of the first electric motor, the control device being configured to adjust the torque of the first electric motor such that a sum of an engine torque and the torque of the first electric motor is balanced with an input-side load torque generated in the input-side rotating element depending on a speed ratio of the hydraulic power transmission device when the operating point of the engine is controlled, the control device being configured to calculate the input-side load torque based on engine rotation speed indicated by the target engine operating point and determine the torque of the first electric motor based on the engine torque indicated by the target engine operating point and the input-side load torque, the vehicle drive device further comprising a capacity variable device varying a characteristic of a capacity coefficient of the hydraulic power transmission device relative to a speed ratio of the hydraulic power transmission device that is a hydraulic characteristic of the hydraulic power transmission device for determining the input-side load torque.

Description

TECHNICAL FIELD[0001]The present invention relates to a control device of a vehicle drive device including an engine, an electric motor, and a hydraulic power transmission device such that power of the engine can be transmitted through a plurality of transmission paths.BACKGROUND ART[0002]A vehicle drive device is well known that includes a hydraulic power transmission device having an input-side rotating element to which power from an engine is input and an output-side rotating element outputting .power to drive wheels. For example, this corresponds to a vehicle drive device described in Patent Document 1. Such a vehicle drive device has an engine rotation speed (corresponding to a rotation speed of the input-side rotating element of the hydraulic power transmission device) passively determined depending on a vehicle speed (corresponding to a rotation speed of the output-side rotating element of the hydraulic power transmission device), a hydraulic characteristic of the hydraulic p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(United States)
IPC IPC(8): B60W20/00B60L50/16
CPCY10S903/902B60W20/10B60K6/445B60K6/547B60W10/026B60W10/06B60W10/08B60W10/10Y02T10/62B60W10/023B60W30/1882
Inventor TABATA, ATSUSHIIMAMURA, TATSUYA
Owner TOYOTA JIDOSHA KK
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com